A. C. . Lubis, A. N. . Nasution, and H. A. P. . Lubis, “Prevalence of Congenital Heart Disease and Pediatric Rhythm Disorder or Arrhythmia in Children in Rantau-Prapat City, North Sumatra, Indonesia”, JETROMI, vol. 5, no. 4, pp. 169–176, Nov. 2023.